Brush apparatus



Nov. 16, 1920. 1,607,500

' J. V. AGAR ET AL B'RUSH APPARATUS Filed June 18, 1925' 2 Sheets-Sheet11 9' I 9 1MB,

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J. V. A GAR El AL BRUSH APPARATUS Filed June 1925. 2 Sheets-Sheet 2 u 14us m I t Jbhan V g Kal'L .aJi'arla-s'on) W Axel W Patented Nov. 16,1926.

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JOHAN VERNER AGARJKARL GIDEQN KARLssorL' Nn 'AXEL. WAHLFRH) Barter/ AN,

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BRUSH APPARATUS.

Application filed June 18, 1925, Serial No. 38.068, and in sweflen June19, 1924.

The present invention relates to apparatus for waxing or polishingfloors or for similar purposes of the kindcomprislng rotatable brushrollers which are driven by an electric motor. 7

The invention has for its objectto provide a brush-apparatus of thiskind which is simple in construction, efiicient' in operation andcomfortable in use.

Referring to the drawings, illustratingone embodiment of the invention,Figure 1 is a side elevation of the brush-apparatus, Figure 2 ahorizontal section on the line IIII in Figure 1, Figure 3 a verticalsection 011 the line III-III in Figure 2 and F igure 4 a verticalsection on the line IV-IV in Figure 1. 7

On the drawing 1 denotes the rotor of the electric motor, 2 the statorthereof, and 8 the motor shaft. This shaft is substantially vertical andjournalled by preference in ballbearings at. The lower end of the shaftcar-' ries a worm 5 which meshes with two worm wheels 6 located ondiametrically opposite 25 sides of the worm a and fixed each on a shaft7. The inter-meshing wheels 5, 6 are enclosed.

in a casing 8 the walls of which support ballbearings 9 in which theshafts 7 are journalled. The two shafts 7 are mutually pan allel andcarry each two brush rollers 91.

The four brush rollers 91 are arranged by pairs in a symmetrical manneron each side of the vertical middle plane of the apparatus passingperpendicularly to the shafts 7 so that two brushes on the same side ofthis plane in the working of the apparatus will treat substantially thesame surface.

The body 10 of the respective brush 91 is in the form of a hollowcylinder divided longitudinally into two halves which are detachablefrom each other and from the shaft. The body of each brush rests uponthe shaft by means of lateral walls 11 formed with collars 12. Thesecollars have grooves 13 formed thereon receiving springs 14 in the formof open rings which almost entirely embrace the halves of each collar12. One of these resilient rings, preferably that one on the extreme endof the body, by its one end engages with a boring 15 passing through thecollar into the shaft 7. By this means the two halves of the body areretained on the shaft and caused to revolve with the latter. Bydisengaging the outer spring 141 from the shaft the brush is readilyremoved from the shaft. a

"The top of the casingS serves as a base.

for the motor and also carries a plate 16 covering the tops andsurrounding the sides of the brushes. The lower edge of this plate has aribbon 1'7 of rubber or the like fastened to the outer side of theplate.

The upper end of the motor shaft carries the slip-rings 18 and theserings as also the brushes (not shown) for supplying the current to saidrings are enclosed by a cover 20.

As will be understood, the apparatus rests upon the brush rollers 91 andon account of the central arrangement ofthe motor the pressure of thebrushes upon the fioor to be treated will be equal all over the surfaceof the brushes in contact with the floor.

When to be used, the apparatus is moved on the floor by means of ahandle 21 pivotally attached to the apparatus. By the electric motor theshafts 7 with the brush rollers 91 are rotated in opposite directions asindicated by the arrows in Figure 1. \Ve do not wish to confine ourinvention to the embodiment above described with refereence to thedrawings but want to be free to vary the details thereof within thescope of the appended claims.

What we claim is 1. A brush apparatus comprising two substantiallyhorizontal shafts each carrying two brush rollers adapted to rotatethereon, an electric motor, the shaft of which is substantiallyvertical, a worm mounted 011 the lower end of the motor shaft, and aworm wheel mounted on each shaft of the brush rollers between the twobrush rollers thereon, said worm meshing with the worm wheels ondiametrically opposite sides of said worm.

2. In an apparatus of the character described, a casing, a pair ofshafts arranged in parallel relation and extending horizontally throughand beyond the opposite sides of the casing, brushes fixed to theoutwardly extended portions of the shafts forrota-tion therewith, amotor having a vertical shaft extending into the casing to a pointbetween the shafts and drive connection betweensaid vertical shaft andthe horizontal shafts.

3. A brush apparatus of the character describedcomprising a gear casing,bearings arranged in the opposite side walls of said casing, a pair ofshafts journaled in said bearings and extending beyond said casing,brushes carried by the extended ends of said shafts, a motor mountedupon said casing, a shaft extending from said motor and depending Withinthe medial portion of said casing, a worm gear carried by the lower endof said shaft, Worin wheels carried by said pair of shafts and adaptedto mesh With the diametrically opposite sides of said worm gear, and ahousing suspended from said casing and extending over said brushes.

4:. A brush apparatus of the character described comprising a gearcasing, a top formed with said casing and extending beyond the oppositesides thereof, a motor mounted upon said top, a cover on said m0- tor,bearings arranged Within said top and cover, a shaft for said motorjournaied Within said bearings and depending Within said gear casing,pairs of brushes connected to and arranged upon the opposite sides ofsaid motor shaft, and a plate supported by said casing and extendingover said brushes.

In witness whereof We have hereunto set our hands.

JOHAN VERNER AGAR.

KARL GIDEON KARLSSON.

AXEL XVAHLFRID BERGMAN.

